<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>登录页面</h1>
<form action="">
    <input type="text" name="username" placeholder="用户名">
    <input type="password" name="password" placeholder="密码">
    <input type="button" value="登录" @click="login()">
</form>
<!--引入axios框架-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<!--引入vue框架-->
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script>
    let v=new Vue({
        el:"form",
        data:{},
        methods:{
            login:function () {
                let data =new FormData(document.querySelector("form"));
            //    发出异步请求
                axios.post("/login",data).then(function (response) {
                    if (response.data==1){
                        alert("登录成功！");
                        location.href="/";
                    }else if(response.data==0){
                        alert("用户名不存在！");
                    }else {
                        alert("密码错误！");
                    }
                })
            }
        }
    })
</script>
</body>
</html>